Seed will generate the Grand canyon in Minecraft PE. This mountain is very high and quite unusual. They are somewhat similar to the mountains in a distant land, but unlike them, it is possible to go and put blocks. In the mountains also there are several waterfalls. Although the mountains look beautiful and unusual, to survive them will be difficult. First, there are very a lot of cliffs, and secondly, due to height restrictions it would be hard to build a house.
Your spawn looks like the following:
You need to turn left and you will see a tall mountains:
Even in a creative mode to explore them for very long. There are many beautiful and interesting places. In such places it is possible to build something interesting: Seed